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Updates in juvenile dermatomyositis: pathogenesis and therapy.
Samantha L Coss1, Sara E Sabbagh2, Hanna Kim3
1Division of Rheumatology, Department of Pediatrics, Nationwide Children's Hospital, Columbus.
Current Opinion in Rheumatology
|July 22, 2025
Summary
Juvenile dermatomyositis (JDM) pathogenesis involves genetic factors, autoantibodies, and immune cell dysregulation. Emerging treatments targeting interferon pathways and CAR T-cell therapy show promise for refractory cases.
Area of Science:
- Immunology
- Genetics
- Pediatric Rheumatology
Background:
- Juvenile dermatomyositis (JDM) is a rare autoimmune disease affecting children.
- Understanding JDM pathogenesis is crucial for developing effective treatments.
Purpose of the Study:
- To provide updated insights into the pathogenesis of juvenile dermatomyositis.
- To review recent advancements in the treatment of JDM.
Main Methods:
- Literature review of recent studies on JDM pathogenesis and treatment.
- Analysis of genetic risk factors, autoantibodies, and immune cell involvement.
- Evaluation of emerging therapeutic strategies.
Main Results:
- Genetic factors like C4 copy number and myositis-specific autoantibodies (MSA) are implicated in JDM pathogenesis.
- Interferon (IFN) pathways, vasculopathy, and mitochondrial dysfunction are increasingly recognized as key players.
- Emerging therapies including Janus kinase inhibitors, dazukibart, anifrolumab, and CAR T-cell therapy show potential for refractory JDM.
Conclusions:
- JDM pathogenesis is multifactorial, involving genetic, autoimmune, and inflammatory components.
- Targeting IFN pathways and utilizing cellular therapies like CAR T-cells offer new hope for treatment-resistant JDM.
- Further research and innovative clinical trials are essential to improve JDM treatment outcomes.
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